paper

Parametric Statistics of Individual Energy Levels in Random Hamiltonians

arXiv:cond-mat/0207456 · doi:10.1103/PhysRevE.67.025202

Abstract

We establish a general framework to explore parametric statistics of individual energy levels in disordered and chaotic quantum systems of unitary symmetry. The method is applied to the calculation of the universal intra-level parametric velocity correlation function and the distribution of level shifts under the influence of an arbitrary external perturbation.

5 pages; published version with typos corrected

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